Carbureter.



y MTA/5555s.

No. 871,730; PATENTBD Nov. 1'9, 1907.

J. A. MUHARDY.

CARB'1111712121511.l

APPLICATION FILED JULY 24. 1906.

2 SHEETS-SHEET 2.

/NvE/v TUR,

UNITED STATES PATENT oEEioE.

JAMES A. MCHARDY, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO STANDARDCARBURETER COMPANY, OF RHODE ISLAND.

OF PROVIDENCE, RHODE ISLAND, A CORPORATION CARBURETER.

Specification of Letters Patent.

Patented Nov. 19, 1907.

lppiicaeon met July 24.1906. serai No. 327.541.

`State of Rhode Island, have invented certain new and usefulImprovements in Carbureters,

reference being had therein to the accompanying drawings.

Like reference numerals indicate like parts. Figure 1 is an elevation ofmy improved carbureter.l Fig. 2 is a central vertical section of thesame. g Fig. 3 is a cross-sectional view on linefmoi Fig. 2. Fig. 4 is acrosssectional view on line y y of Fig. 2. Fig. 5

F`l`is a plan view of the top of said carbureter.

My invention relates to the class of carbureters for `use withinternal-combustion cngines to supply the same with the vapors olhydrocarbon oil, and it consists oi the novel construction andcombination of the several parts as hereinafter described andspecilically set forth in the claims. l

ln the drawings l represents the case or bodyportion of a carbureter. Itis preferably cylindrical and provided with the annular enlargements andsockets 2 and 3 at its upper and lower ends, respectively. It also hasan inwardly extending flange 4, thus affording the chambers or spaces 5'and 6, of equal diameters, and the central intermediate chamber or space7, of less diameter than the l'diameters of the chambers or spaces 5 and6, but all said chambers or spaces are continuous with each other in thesaine axial line. 'llie upper space 5 is the carbureting `chamber, thelower space 6 is the air chainbei' and the central space 7 is thespraying chamber.

A supply pipe 8 conducting air from the external atmosphere is connectedto the cai'- bureter case or body 1 in the socket or annular enlargement2 thereof. A tube or sleeve 9 opens into the carbureter case or bodyl atits upper end onone side and is provided with the annular flange 10,which has an interior screw-thread, as shown in Fig. 2. Apipe 11 hasscrew-threads at its inner end, which engage the screw-threads of thelange; `10. The pipe 11 conducts the products of the carbureting chamber5 to the cylinder of the engine in the direction indicated by the arrow12 in Fig. 2.

Inthe upper socket 3 ol the body or case 1 of which the following Ais aspecification,-

a screw cap 13 is mounted and engaged therewith by the screwthreads, asillustrated in Fig. 2, the knurled'flange of said cap ex tending outbeyond the upper edge of the annular enlargement 3 of the case or body;This screw-cap has a central depression 14 and web, the latter having a-plurality of apr ertures for the admission of air, as indicated by thearrows 15 and 16.

A throttle valve 17 is mounted fast on rod or pivot 18 in the pipe 9.Said valve is circular, and its diameter equals the diameter of saidpipe 9, so as to close said pipe 9 when the valve is in the positionshown'in solid lines in Fig. 2.

An air-intake valve 19 is mounted fast on a rod or pivot 20. One end ofthe pivotal rod 20 is mounted rotatably in the interior annular flange4' and the opposite end of the pivotal rod 20 passes through said flangeand projects out diametrically, as illustrated in Fig. 3. The valve 19has a 'rectangular opening or aperture 21, shown in top plan in Fig. 3,and indicated by the arrow in Fig. 2. The diameter of the valve 19 isequal to that of the bore of the chamber'7, so that said valve, which iscircular, closes said bore (eX cept for the rectangular space 21) whenthe valve is in the position shown in Fig. 2.

In the chamber or space 6 is the gasolene or oil leed-pipe 23, extendingdiainetrically across it and passing through bosses 24, 25, as seen inFig. 4. The bore of this 'pipe is indicated at 26. A stand pipe ordischarge pipe 27 extends up from the pipe 23, the bore 2S ol' said pipe27, opening into the bore 26 of the pipe 23, as seenin Figs. 2 and 4.'lhe upper end of the bore 28 ol' the stand pipe 27 has a conicaldepression or valve seat, as seen inl Figs. 2 and 3. The leed pipe 23 atits outer end is closed by a screw plu r 29. Gasolene, or otherhydro-carbon oil, ilows from a tank or chamber (not shown) through thefeed-pipe 23, and up through and out of the bore 28 ofthe stand pipe 27,iroin which it is drawn by the suction of the piston ol the en-v linterveningradially-extending ribs, as seen in Fig. 2. `Its upper endhas avknurled head 32 and its lower endis formed into a conical point33, which is adapted to close the bore' v28 of the stand pipe 2 'seatthereof.A

in the conical valve An auxiliary air-valve consists of a `circular disk34,' whose diameter 1s nearly eqlilial to the diameter'of the chamber 5,so t at said disk is movable in said chamber, asy shown in Fig.' 2.

The disk 34 has a tubular stem 35. A cross pin 36 extends through theshank of the needle valve 30. A collar 37 surrounds the shank of theneedle valveand rests upon the cross in 36. A spiral spring 38 surroundsthe tu ular stem 35 and t which spring abutsthe under surface of the'disk 34v and-the other end of which abuts the upper surface of thecollar 37. From the lcenter of the web or depression of the screwcap 1,3on the up er side thereof a tube 39, integral therewit extends, wlnchhas a screw-threaded bore to engage the threaded portion 31 ofthe needlevalve 30.. The spiral spring 38 presses'the disk 34 lnto contact withthe undeifsurface' of the screw-cap 13.

vA check nut 4`fts tightly on the'threaded portion 31 of the needlevalve shaft and is in `contact with the upper surface of the sleeve ortube 39. -A handle 41 projects from the check nut 40.

A bent or V-shaped'lever 42, 42', hasa I hub 43 at its apex, and isthere split, as at 44,

and rovided with two clamping ears 45.

The ub 43 lits upon' the rod or pivot 18 of' the throttle valve 17 andis secured thereto by the screw 46, which draws and tightens the'clamping ears 45 toward each other.- A

rod 47 is mounted at its end upon a pivot 48 and is held fromdisplacement by a spring pin 49. A lever arm 50 has a hub 51, by

' which itis iitted to the rod or pivot 20, and

'fastened by a spline 52. A link bar 53 is connected to the lever arm 42by tl1e pivot 54 and to the lever arm 50 by the pivot 55.

The operation of my improved carbureter is as follows: By one pull ofthe rod 47 in the 19 in opening moves'in the directionrindi-y cated bythe arrow. The cross-hatched portion of the valve 19 represented inFig.-2 constitutes the stop, limitingl the movement o'f the valves 19land .17 to 90 1n opening, at which limit said portion of the valve 19comes up into contact with the shank o f the needle valve 30 and canmnvelno farther. The Aneedle valve 30 is in threaded engagee shank ofthe needle valve, one end of'- ment with the .tube`39L .By turning thehead 32 the position of the needlevalve lengthf wise in said tube isadjusted. and thus is deneedle valve extending from-the bottonfrgof thetube 39 toward the conical valvebseinf?" the upper end of the stand pipe27. `Whcn f l the needle valve 30 has been so adjusted, it

is held by tightening the check nut 40, a ainst the tube 39'. In thismanner the desire vent between the conical valve point'33 and. said'valve'seatis. maintained until changed by'L the operator.

The the car ureter and enginenoperative', if it is desired to set theengine in motion, the chauffeur draws the rod 47 in the direction of thearrow 56. This movement of the rod 47 moves the bent lever 42, 42', inthe direction indicatedby the arrow 59, and at the same time, by meansef the link connection 53,r 50,

moves the `lever arm 50 in the direction indiarts being, adjusted' asdescribed, and l sc f catedI by the arrow 60. lf-the rod 47 is'.4

drawn to the full extent possible, thei'throt'tle' valve 17 is 'therebymoved fron; the position shown in Fig. 2 in solid lines to the positionshown in said figure in dotted lines, and the air valve 19 is moved fromthe position shown in Fig. 2 to a vertical position (not shown) 909therefrom. Air from the external atmosphere rushes through the' pipe 8,as indicated by the arrow 58, into the air chamber 6, throughthe'aperture 21 ofthe valve 19 and into the spraying chamber 7. Thegasolene or oil spray is dissipated and eva orated in the chambers 7 and5 in the wel -known manner, and the carbureted air thus produced passesout through the 'pipe 11 to' the engine, as indicated by the arrow 12.

' It'is'to be observed that the bore or diame' ter of the chamber orspace 7 is somewhat less than the bore or diameter of thethroat or pipe9, so that the suction of the piston of the engine tends to cause apartial vacuum in the carburcting chamber 5, thus facilitating'th'edissipation of the gasolene or oil spray, and

the result is a uniformity of proportion of thel atmospheric air and thehydrocarbon vapor in the mixture, at all times, and in alloperativepositions of the valves 19, 17 to whatever degree or extentsaid valves may be.

open. n case the suction of the piston exceeds a' predetermined limit,and thereby creates an undesirable vacuum in the carbureter, thepressure of the external atmosphere overcomes the tension of the spring38, whereupon the disk 34 moves inwardly and allows the outer air toflow into the chamber 5 through the apertures 15 and 16, as'indicated barrows 1n Fig. 2, until the vacuum is relieve and the spring 38 thencloses the disk 34 to the screw-cap -13 again.

In my device above described, the-bores, spaces, or chambers 5, 6, 7 areexperimentally tested and determined in 'order to get an exan airchamber,

act relation between the valves 17 and 19, so that the carbureter isbalanced, and positive, uniform results are obtained, whereby theproduct carried to the engine is of the same quality and density and hasthe same proportion of air and gaseous ingredients at Whatever positionor degree of opening the valves 17 and 19 may stand.

I claim as a novel and useful invention and desire to secure by LettersPatent:

1, ln a carburetor, the combination of a case or body portion, acarbureting chamber, a spraying chamber which chambers are within saidcase or body, means for conducting gasolene to the spraying chamber, anair pipe to conduct atmospheric air to the air chamber, a discharge pipeto conduct the mingled gasolene vapor and air from the carburetingchamber, an

air valve mounted in the spraying chamber adapted to rotate on apivotrod which extends diaietrically across the spraying chamber, a throttlevalve located in the discharge pipe of the carburetcr and rotatablymounted on a pivot rod which extends diametrically across said dischargepipe of the carbureter, a V-`shaped lever secured at its apex to theivot rod of the throttle valve on tlie'outer si( c of the case or body,a lever arm l secured on the pivot rod of the air valve on the outerside of said case or body, a link bar pivotally connectedat its endsrespectively to said lever arm and to one end of said V- shaped lever,and a rod pivotally connected to the other end of said V-shaped lever.

2. In a carbureter, the combination of a circular spraying chamber, acircular air valve having a permanent air passage t'hroiigh it whichvalve has a diameter equal to that ol the chamber, a gasolene-disehargepipe extending through said valve aperture into said chamber, a needlevalve adapted to open and close said discharge pipe, a dialnetrically-arranged pivot rod upon which said air valve is mounted in saidchamber, and

l means Jfor rotating said air valve, said valve being so arranged thatits solid part opposite l, to said air passage therein when said valveis moved to open position comes into contact with the needle valve tolimit the rotation of the valve to 90.

In testimony whereof I alix lily-signature in presence of two witnesses.

JAMES A. MCHARDY.

Witnesses:

WILLiAM E. Pauw, WARREN lt'Pnaon.

